Case for electric hand drills



l. SWEETLAN'D, EXCUTRIX. CASE ECR ELECTRIC HAND DRILLS.`

APPLICATION FILED JUNE 23,1921 1,41 1,539. Patented Apr. 4, 1922.

4 CASE FOHELECTRIC HAND DRILLS.

P PLICATLON FILED sunEzs. 1921.l

1,411,589. ratentedApf. 4,1922.

SHEETS-SHEET 2;

PArENr orticaO ARTHUR H. SWETLAND, IIDECEASED, LATE F LAOS ANGELES, CALIFORNIA, BY INEZ SWEETLAND, 0F LONG- BEACH, CALIFORNIA, EXECUTRIX OF SAID ARTHUR H.

SWEETLAND.

CASE FORELECTRIO HAND nRILLs.

specification of Letters Patent.

Patented Apr. 4, 1922.

Original application filed October 20,l 1919, Serial No. 331,864. Divided and this application led Jun-e To all whom# may concern.

y 2 a rear end elevation thereof; Fi

Be it known that ARTHUR H. SWEETLAND,

deceased, late a citizen of the llnited States.- Y

and resident of Los Angeles, in the county 0f Los Angeles and State of California, did invent new and useful lmpr'ovements in Cases' for Electric Hand Drills, of which the following is a'full, clear` and accurate 'disclosure. j l. t

The present invention pertains generally to electrically operated hand drills, and specifically t0 a case therefor; the particular .object being to provide a case or housing of,

this character, which will be simple and inexpensive to manufacture; admit of ease and economy in assembling` together with the several parts ofthe drill; and, in its construction, will be conducive to efficient handling of the drill. l

ln this connection it may be stated that the drill is designed to be held and operated by one hand, other details of which are shown and 'described in a co-pending application, Serial No. 331,864, filed October 20th, `1919, of whichl this case -is a divisional'continuation.

A. more detailed description of the case will be made in the `following specification, reference being made therein to the' accompanying drawings, forming a part thereof, and in v vhichl Fig. 1 is a .side elevation of the case; Fig. g. 3 a front elevation thereof; Fig, 4f a longitudinal vertical section talren through the center thereof, as indicated by the line .lL-40u Fig. 2 showing the enclosed drill mechanism in place, llig. 5 is a transverse vien7 taken as indicated by the line 5-5 on Fig. 4; and F ig. 6 is a similar View with the plate 27 removed. l y

ln the drawings .the numeral 10 designates the body portion of tie case, which may be lconstructed of any suitable material, and 11 'a handle or hand-grip, preferably formed Serial-No. 479,868.

structure, generally ,designated by the numeral 14. l

The handle 11 is hollow, having an opening -15 extending therethrough communicating with the interior of the case; being joined to the end wall 13 of the case 10, intermediate its longitudinal axis and its periphery; and designed to extend downwardly to form a pistol-grip suitable for holding the drill in one hand. A cable 16 is passed through the opening 15 in the handle 117 to furnish electrical energy for operating the motor 12; this cable connecting with a suitable. spring switch 17, located in the end Wall 13 of the casing above and to one side of the handle connection. and designed to be actuated by the thumb of the hand holding the drill, through the medium of a push button 18, suitably arranged and .positioned for this purpose.

'The details of this switch need not here beexplained.

One end. of the shaft 19. of the armature 20 is revolubly journaled in a suitable bear' 'through the. medium ofthe gear 24 meshing with a smaller gear'26, formed on the adjacent end ofi the armature shaft 19. rl`he plate 14 is recessed-as at lea-to receive the gears 24 and 2G, the housing being completed by a complementary circular clo sure plate 27, secured t@ the inner-.face of the plate 14 by means of screws 28, as clearly shown in Figs. 4 and 5.

The closure plate 27 also serves as a thrust plate for the. shaft 23, during operation of the drill; being provided, for 'this purpose with a thrust bearing bloeit 29, adapted to be engaged by a ball thrust bearing 30, carried in an axial bore BOE in the end of the shaft ict- lll" beine f2. 'ino e r. 1 i. e .v e to eoniorin to die diameter or die eai 1 `with the bearin.; E ol a dialn-y e loire" or recessed portion ll"L being;y substantially circular, concent le VJne bearing' 25, and et a dininetef and oth snliieient to surround and enclose the perimeter and one side o'l' the gear 2l.

'W e upper portion le has a substantially flange lll, adjacent its periphery.` inwardly from its inner tace, and lit into the case 'lll to prevent displacementI ot the former: this 'Forming a shoulder 2&2 to abut against the end of the Case in the manner shown. The llange Bl terminates at ther periphery ol the closure plate 2? (see Fig'. el) and the outer 'lace oi5 this plate is (fo-planar with the shoulder 32, so that an unbroken engagement is made 'ith the end ol the ease. 10; thereby obviating the neessity ol reeessingn this end oit the ease, the advantage of which.) in the present instance, will be later ezipleine/d.

The plate ll is removably secured to the ease ll) by means of diainetrieally opposed sereirs 33, extending therethrough and screwfthreadedly engaging internally screwthreaded bores in bosses Bil on the interior oli the ease (see l and 2). Thus the 4plate together with the plate 2T, Jarry-- ing the shatt and gear 9A, may be removed as a unit irorn the ease l0 to gain access to the interior thereof, inerelybjyv removing; screws 33.

lt may loe here noted that the longitudinal exis ot the shaft 2S is substantially'in alignment With the line oi push et the han-` dle l" -n order that the `torce exerted upon the latter during the drilling; operation will he in alignment with the drill hit; thereby obtaining the inost etlioient results. ln this connection attention is direeted to the fact that in case it should he desired to bore a hole in an otherwise inaccessible corner, seren's may he rn'xored and the plate leiA and its carried i. arts rotated throughlSOO, and the' screws replaced; the shalt 23 then extending troni the side oit the ease lO opposite the handle ll, or diametrically opposite the position shown in the several figures ol the drawings. BV reason oli the outer 'face oie the plate 2 being1 (fo-planar vwith shoul der 32 and the screws dia-nietriralljf opposed., the position of the plate lll may be thus changed relative to the case l0; the

s fitting alilie in either position.

is rota-table feat-ure. honte-rer, need 1 t ,properly come Within the sfrope ot the ai 'rentioin it is nevertheless lo be hat the right reserved in malre z -hang'es or modilcations in :drown-e wh )ended claims.

l'lai'ing described a preferred `torni ot the intention, l claim z 1. ln an eleetricall)V driven hand drill the eombination of an electric motion a rase therefor, said ease cfnnprisinn a bod)v pon lion lor housing' the motor`r a closure plate reinovabliv secured to one end ol said bod)Y portion, the k`motor armature shaft being' iournaled at one end in said bodyv portion and at its opposite end in said removable plate, a chuck shalt iournaled in said remorable plate below the armature shalt, a gear on the chuck shalt, and a gear on the armature shaft meshing With the lirst mentioned gear lo drive the chuck shaft, the Closure plate belng` recessed to receive said gears. and another closure plate secured to the first mentioned closure plate, to complete the housing'` 'for the chuck shattand gear secured thereto.

2. ln an eleot-ricall;T driven hand drill the combination of an eleclirie motor.y a case therelora Said. ease comprising' a body portion for housing' the motor. a closure plate reniovablj7 Secured to one end ol said bod)Y portion, the motor armature shalt beinl journaled at one end in said body portion and at its opposite end in said removable plate, a chuck shaft jonrnaled in said removable plate parallel with and below the armature sha-tt7 a gear on the chut-l; shaft, a gear on the arinatiu-e sin. meshing with the mentioned rear to drive the ehuclr ra i, bod): poi tion for housineflhe motor. :i rlosnre plate removably secured lo one end olf said bedr hait being,- portion portion. the motor ionrnaled at one enf* and alfits oplosite Vd removable plate, a Chuck shalt ioni; .n said remorable plate parallel nih an i onset troni the armature shaft; a r on the diuehV shatt: on the firmar'. ling' with the .First mentioned i die rlincl: shaft; the closure l i' d 'we and house secured lo thf.

CJ l

lli

l 1 movable plate parallel with and offset from with the inner` face of the first mentioned l*plate to form an unbroken engagement with y the end of said body portion; the first men- Y and Aat its, opposite end in'said removable plate', al chuck shaft journaled in said rethe armature shaft; a gear on-the. chuck shaft; a gear on the armature shaft meshing with the firstl mentioned gear to drive the chuck shaft; the closure platebeing recessed to receive and house said gears; a second closure plate secured to the first mentioned closure plate to complete the housing ofthe chuck shaft and gear lsecured thereto, and to form a thrust bearing for the chuck shaft,the outer face of said Alast mentioned plate bein plate being 4co-plana-r with the inner face of the first mentioned platev to form anunbroken engagement .with -the end of said body portion; the first mentioned closure secured to saidl bodyv portion by diametrica ly opposed screws'.

5?. In. an electrically driven hand drill the combination of an electric motor;` a case therefor ;saidcase comprising a cylindrical body portion for housing the motor; a clo- 4 portion; t nwardl Said bo sure plate removably "secured to one endof said body portion, the motor armatureshaft being journaled at one end in said body portion and at its opposite end in said removable plate; a chuck shaftkjournaled in said removable plate parallel with and offset from the armature shaft; a gear on the chuck shaft; a gear `on the armature shaft meshing with the first. mentioned'gear to drive the chuck shaft; the Vclosure cessed to receive and house said gears; a second closure plate vsecured to the first mentioned closure platey to complete the housing of the chuck shaftand gear secured lthereto and to form a thrust bearing for the chuck shaft, theouter face of said last mentioned plate being co-planar-with the inner face of the .first mentioned plate to form anunbroken en agement with the end of said body lilie-rstmentioned plate having an extending'ange to extend into y portion to prevent its lateral dis- 'the combination of anplate being replacement; said plate beingalso secured to the body portion by diametrically opposed screws.

. 6. In an electrically operated r1hand drill,`

the combination of anr electric motor; a case therefor; a handle for supporting the case; a removable closure plate secured to one end of said case; a` chuck shaftcarried by said plate and operatively connected to said motor; said 'shaft being axially offset relative to the center of the case; and means to secure said closure plate to the case so the chuck shaft'may extend therefrom in diametrically opposed positions.

In an electrically operated hand drill,

the combination'vof an electric motor; a case therefor; -a handle extendingfrom one end of the case; a removable closure plate secured to the end of the case opposite said handle; a chuck shaft carried by said plate and operatively connected to the motor, said'shaft being axially offset relative to thecase; said closure plate being attachable to the case so the chuck 'shaft will extend therefrom in either of two diametrically opposed posi- 8. In an electrically operated hand drill; the' combination of an electric motor; a case therefor; a handle extending radially from one endof the case; `a removable closure plate secured to the oppbsite end of the case a chuck shaft carried by said plate and oper' atively connected to the motor; said shaft being axially offset relative to thecase; said closure plate being attachable tothe case. so

the 'chuck shaft Will extend substantially axial of the point of attachment of said handle or from a point diametrically opposite thereto.

9. In an electrically operated hand drill; I

electric motor;-a case therefor; a handle extendingradially from one-end of-the case; a closure plate removably secured tothe opposite end of the case;- a chuck shaft carried by said plateand operatively connectedlto t-he motor; said shaft being axially offset relative to the center of the case; said closure plate beingfattachable tothe case to permit Vits rotation and attach- `ment so the chuck shaft may extend from Vthe case in different .positions relative to the handle.

In Witness thatv I claim the foregoing I have `hereunto subscribed my name this 17th day of June, 1921.

INEZ sWEETLAND, 

